package com.john.blog.config.web.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Component;

/**
 * 跨域过滤器
 * 
 * @author JiangGengchao
 * @date 2018年3月11日
 */
@Component
public class CrossFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Headers", "Authentication");
        /*
         * response.setHeader("Access-Control-Allow-Methods","POST,GET,OPTIONS,DELETE");
         * response.setHeader("Access-Control-Max-Age","3600");
         * response.setHeader("Access-Control-Allow-Credentials","true");
         */
        filterChain.doFilter(servletRequest, servletResponse);
    }

    @Override
    public void destroy() {
    }

}